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Red Hat Linux Enterprise 8 のメッセージログにおける systemd PAM セッションエラー

Solution Verified - Updated -

Issue

IDM サーバーを使用するように設定された RHEL8 サーバーにログインしようとすると、/var/log/messages ログに次のエラーが表示される。

Oct 15 08:44:03 localdomain systemd[1]: Started Session 16 of user john_doe.
Oct 15 08:44:03 localdomain systemd[550765]: PAM failed: Permission denied
Oct 15 08:44:03 localdomain systemd[550765]: user@125413742.service: Failed to set up PAM session: Operation not permitted
Oct 15 08:44:03 localdomain systemd[550765]: user@125413742.service: Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted
Oct 15 08:44:03 localdomain systemd[1]: user@125413742.service: Failed with result 'protocol'.
Oct 15 08:44:03 localdomain systemd[1]: Failed to start User Manager for UID 125413742.
Oct 15 08:44:03 localdomain systemd[1]: user-runtime-dir@125413742.service: Unit not needed anymore. Stopping.
Oct 15 08:44:03 localdomain systemd[1]: Stopping /run/user/125413742 mount wrapper...
Oct 15 08:44:03 localdomain systemd[1]: Stopped /run/user/125413742 mount wrapper.
(uid=125413742=john_doe@localdomain)

ただし、このエラーでユーザーがログインできなくなるわけではない。

Environment

  • Red Hat Enterprise Linux (RHEL) 8.x
  • Red Hat Identity Management (IDM) on RHEL 7

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